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Battery Charger Lead-Acid/Li-Ion/NiMH/NiCD 8000mA 8V to 18V 24-Pin VQFN EP T/R, BQ24705RGER, Texas Instruments

The bq24705 is a high-efficiency, synchronous battery charger with integrated compensation, offering low component count for space-limited multi-chemistry battery charging applications. Charge current and voltage programming allows high regulation accuracies, and can be either hardwired with resistors, or programmed by the system power-management microcontroller using a DAC or GPIOs. The bq24705 charges two, three, or four series Li+ cells, supporting up to 8 A of charge current, and is available in a 24-pin, 4×4-mm thin QFN package. The bq24705 features Dynamic Power Management (DPM) and input power limiting. These features reduce battery charge current when the input power limit is reached to avoid overloading the AC adapter when supplying the load and the battery charger simultaneously. A highly-accurate current-sense amplifier enables precise measurement of input current from the AC adapter to monitor the overall system power.

  • NMOS-NMOS Synchronous Buck Converter with 600 kHz Frequency and >95% Efficiency
  • 30-ns Minimum Driver Dead-time and 99.5% Maximum Effective Duty Cycle
  • High-Accuracy Voltage and Current Regulation
    • ±0.5% Charge Voltage Accuracy
    • ±3% Charge Current Accuracy
    • ±3% Adapter Current Accuracy
    • ±2% Input Current Sense Amp Accuracy
  • Integration
    • Internal Loop Compensation
    • Internal Soft-Start
  • Safety
    • Input Overvoltage Protection (OVP)
    • Dynamic Power Management (DPM) with Status Indicator
  • Supports Two, Three, or Four Li+ Cells
  • 5 – 24 V AC/DC-Adapter Operating Range
  • Analog Inputs with Ratiometric Programming via Resistors or DAC/GPIO Host Control
    • Charge Voltage (4-4.512 V/cell)
    • Charge Current (up to 8 A, with 10-mO Sense Resistor)
    • Adapter Current Limit (DPM)
  • Status and Monitoring Outputs
    • AC/DC Adapter Present with Programmable Voltage Threshold
    • DPM Loop Active (DPMDET)
    • Current Drawn from Input Source
  • Supports Any Battery Chemistry: Li+, NiCd, NiMH, Lead Acid, etc.
  • Charge Enable
  • 10-µA Off-State Battery Current
  • 24-pin, 4×4-mm QFN Package
  • APPLICATIONS
    • Notebook and Ultra-Mobile Computers
    • Portable Data-Capture Terminals
    • Portable Printers
    • Medical Diagnostics Equipment
    • Battery Bay Chargers
    • Battery Back-Up Systems

    • Характеристики

    Battery_type

    Lead-Acid, Li-Ion, NiCD, NiMH
    Operating_temperature

    -40 to 125 °C
    Specifications

    http://www.ti.com/general/docs/lit/getliterature.tsp?genericPartNumber=BQ24705&&fileType=pdf
    Schedule_b

    8542390000
    Product_dimensions

    4 x 4 x 0.88 mm
    Pin_count

    24
    Output_voltage

    8 to 18 V
    Output_current

    8 A
    Supplier_package

    VQFN EP
    Msl_level

    2
    Бренд

    Mounting

    Surface Mount
    Max_processing_temp

    260
    Lead_finish

    Gold
    Kind

    Battery Charger
    Htsn

    8542390001
    Eccn

    EAR99
    Country_of_origin

    Malaysia
    Артикул: BQ24705RGER

    Описание

    The bq24705 is a high-efficiency, synchronous battery charger with integrated compensation, offering low component count for space-limited multi-chemistry battery charging applications. Charge current and voltage programming allows high regulation accuracies, and can be either hardwired with resistors, or programmed by the system power-management microcontroller using a DAC or GPIOs. The bq24705 charges two, three, or four series Li+ cells, supporting up to 8 A of charge current, and is available in a 24-pin, 4×4-mm thin QFN package. The bq24705 features Dynamic Power Management (DPM) and input power limiting. These features reduce battery charge current when the input power limit is reached to avoid overloading the AC adapter when supplying the load and the battery charger simultaneously. A highly-accurate current-sense amplifier enables precise measurement of input current from the AC adapter to monitor the overall system power.

  • NMOS-NMOS Synchronous Buck Converter with 600 kHz Frequency and >95% Efficiency
  • 30-ns Minimum Driver Dead-time and 99.5% Maximum Effective Duty Cycle
  • High-Accuracy Voltage and Current Regulation
    • ±0.5% Charge Voltage Accuracy
    • ±3% Charge Current Accuracy
    • ±3% Adapter Current Accuracy
    • ±2% Input Current Sense Amp Accuracy
  • Integration
    • Internal Loop Compensation
    • Internal Soft-Start
  • Safety
    • Input Overvoltage Protection (OVP)
    • Dynamic Power Management (DPM) with Status Indicator
  • Supports Two, Three, or Four Li+ Cells
  • 5 – 24 V AC/DC-Adapter Operating Range
  • Analog Inputs with Ratiometric Programming via Resistors or DAC/GPIO Host Control
    • Charge Voltage (4-4.512 V/cell)
    • Charge Current (up to 8 A, with 10-mO Sense Resistor)
    • Adapter Current Limit (DPM)
  • Status and Monitoring Outputs
    • AC/DC Adapter Present with Programmable Voltage Threshold
    • DPM Loop Active (DPMDET)
    • Current Drawn from Input Source
  • Supports Any Battery Chemistry: Li+, NiCd, NiMH, Lead Acid, etc.
  • Charge Enable
  • 10-µA Off-State Battery Current
  • 24-pin, 4×4-mm QFN Package
  • APPLICATIONS
    • Notebook and Ultra-Mobile Computers
    • Portable Data-Capture Terminals
    • Portable Printers
    • Medical Diagnostics Equipment
    • Battery Bay Chargers
    • Battery Back-Up Systems

    • Детали

    Battery_type

    Lead-Acid, Li-Ion, NiCD, NiMH
    Operating_temperature

    -40 to 125 °C
    Specifications

    http://www.ti.com/general/docs/lit/getliterature.tsp?genericPartNumber=BQ24705&&fileType=pdf
    Schedule_b

    8542390000
    Product_dimensions

    4 x 4 x 0.88 mm
    Pin_count

    24
    Output_voltage

    8 to 18 V
    Output_current

    8 A
    Supplier_package

    VQFN EP
    Msl_level

    2
    Бренд

    Mounting

    Surface Mount
    Max_processing_temp

    260
    Lead_finish

    Gold
    Kind

    Battery Charger
    Htsn

    8542390001
    Eccn

    EAR99
    Country_of_origin

    Malaysia

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